The exceptions are overruled, and the foregoing decision of the referee is affirmed. Section 57g of the act provides that “the claims of creditors who have received preferences shall not be allowed unless such creditors shall surrender their preferences.” lire prohibition extends to all claims of such creditors against the estate of the bankrupt, and is not, as in the act of 1867, confined to the claims “on account of which the preference is made or given.”